atomic structure molecules and nuclear chemistry - Category wise Question and Answer Practice Test with Solutions

Question : 16 [CDS]

Which one of the following reactions is the main cause of the energy radiation from the Sun?

a) Chemical reaction

b) Fission reaction

c) Fusion reaction

d) Diffusion reaction

Question : 17

Which of the following has a charge of +1 and a mass of 1 amu ?

a) A proton

b) An electron

c) A neutron

d) A helium nucleus

Question : 18 [NDA]

Match List-I with List-II and select the correct answer using the code given below the lists.

a) 1 4 3 2

b) 2 4 3 1

c) 2 3 4 1

d) 1 3 4 2

Question : 19 [NDA]

The number of protons in a negatively charged atom (anion) is

a) more than the number of elecrons in the atom

b) less than the atomic number of the element

c) more than the atomic number of the element

d) less than the number of electrons in the atom

Question : 20 [IAS (Pre) 2003]

Regarding the atom of a chemical element, the magnetic quantum number refers to

a) Shape

b) Size

c) Orientation

d) Spin